Belgium
Baudouin gold Proof "Treaty of Rome Anniversary" 50 Ecu 1987 PR69 Ultra Cameo NGC, KM167, Fr-427. A sharply mirrored specimen showcasing a complete cameo contrast.
https://coins.ha.com/itm/belgium/belgium-baudouin-gold-proof-treaty-of-rome-anniversary-50-ecu-1987-pr69-ultra-cameo-ngc-/a/3085-31210.s?type=CoinArchives3085
HID02906262019
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Estimate: 1000-1200 USD